Dan, Quick reply buttons...

And yep, looks like the iPad Pro it's self confirms it accepts 29 watts worth of charging power, discovered a few months ago elsewhere on the interwebs:


Only possible to deliver that power by using the charger Apple initially shipped for the USB-C MacBook launched last year, and the previously covered Lightning to USB-C cable released yesterday. Again to be clear, the iPad does not have a USB C port. Though this could mean that the Google Pixel C can charge via Lightning when cabled to an iPad Pro.